Stocks waver in early trading on Wall Street

In this Wednesday, April 24, 2013, photo, Kenneth Polcari, right, works with fellow traders on the floor of the New York Stock Exchange. Japan's benchmark stock index surged Friday May 10, 2013 after the dollar hit a four-year high against the yen. Markets elsewhere gained as traders digested a positive U.S. jobs report. (AP Photo/Richard Drew)

NEW YORK (AP) -- U.S. stocks flipped between minor gains and losses in early trading Friday. After taking a hard hit in the middle of the week, major indexes are on track to end it with a slight loss.

KEEPING SCORE: Thirty minutes after the opening bell, the Standard & Poor's 500 index was down one point to 1,870. The Dow Jones industrial average was up two points to 16,449 and the Nasdaq composite index was down nine points to 4,058.

HOUSING MARKET: Before the market opened, the Commerce Department said builders started work on more houses in April, as construction surged to its highest pace in six months. But almost all of that increase came from new apartment buildings, a sign that Americans are still struggling to buy single-family houses.

BUFFETT BUMP: Verizon Communications climbed $1.07, or 2 percent, to $49.05 in early trading after Warren Buffett's Berkshire Hathaway revealed a new investment in the company in a filing with the Securities and Exchange Commission late Thursday. Other big-name investors, including John Paulson, also reportedly took stakes in the telecom.

MORE SALES: J.C. Penney stock jumped $1.36, or 16 percent, to $9.72. Rising sales helped the department store chain turn in better results than analysts expected late Thursday. Sales at stores open at least a year — a key gauge of a chain's health — increased more than 6 percent in its first quarter.

OTHER MARKETS: U.S. government bonds barely moved in early trading. The yield on the 10-year U.S. Treasury was 2.51 percent, up from 2.49 percent late Thursday. Gold fell $2.50 to $1,291.10 an ounce. Crude oil rose 16 cents to $101.66 a barrel.